Operation CHARM: Car repair manuals for everyone.

"In-Stock" Batteries

NOTE: Batteries that have not been used for a lengthy period of time eventually discharge themselves, and may become sulfated. If these batteries are boost-charged using a conventional charger they may not accept the charging current, or may only take on a "surface charge" and then prematurely test "fully charged".

Although a boost-charged battery appears to be malfunctioning, check it first, as follows:
- Check specific gravity in every cell.
- Readings must not deviate by more than 0.040 from each other (example: When the highest specific gravity reading is 1.150, none of the other cell readings should fall below 1.110.)

If cell readings are within 0.040 of each other:
- Perform complete battery charging procedure. Service and Repair (Charging Battery(ies).)
- Perform load test to determine if battery is actually malfunctioning.

If reading in one or two adjacent cells is noticeably lower (example: five cells are 1.160, one cell 1.080):
- Battery has short circuit and is malfunctioning